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Study on Electric Vehicle Regenerative Braking Controlstrategy

Author: ZhangJun
Tutor: ZhaoKeGang;FengJin
School: South China University of Technology
Course: Vehicle Engineering
Keywords: electric vehicle regenerative braking control strategy simulation research
CLC: U469.72
Type: Master's thesis
Year: 2011
Downloads: 78
Quote: 0
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Abstract


The characteristic of electric vehicle is regenerative braking. The objectives ofregenerative braking is endurancing mileage of electric vehicle by effectively improvingutilization rate of battery power transforming from kinetic energy of baking. The biggestobstacle of electric vehicle industrialization is short mileage of electric vehicle at present. Theregenerative braking is natural characteristics of motor, also can be give full play inadvantages of electric vehicle realizing energy saving and electric braking. Therefore,regenerative braking is extensive attentioned and thorough researched in the situation ofmotor application.In this paper, on the basis of the need of development of new energy vehicle, the statemodel of regenerative braking was established。The feedback current and armature currentduring regenerative braking are analyzed and calculated, the control strategy to constantcharging power of the combined energy storagesystem of ultracapacitor and battery of electricvehicle is proposed, the energy recovery in regenerative braking is researched and simulatedon the basis of reference to related research results at home and abroad. The research showsthe results as follows:1) The structural characteristics of electric vehicle and the working process ofregenerative braking are analyzed, also dynamic analysis on the working process ofregenerative braking is completed. The working process and principle of e energy recoveryare studied.2) On the basis of working characteristics of braking system of Soueast V3 LioncelVehicle and three kinds of typical braking control strategy, a new braking force controlstrategy is proposed, the energy recovery in the maximal degree is completed by the premiseof meet of braking stability using this new braking force control strategy.3) According to this new braking force control strategy, the regenerative braking systemmodel is established using the way of combination of theoretical modeling and numericalmodeling under the MATLAB environment. The simulation of this new regenerativebraking system model also is completed embedding the Simulink dynamic simulation platform.4) The feasibility of the control strategy in this paper is proved by analysis of data andresults of simulation that completed under different typical braking condition. Some relatedparameters in the feasibility of the control strategy simulation model is optimized accordingto simulation results, thus, the braking stability and energy recovery rate are improved, toensure the energy recovery and braking effect optimal achieve the best performance.

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CLC: > Transportation > Road transport > Automotive Engineering > A variety of automotive > Various energy vehicles > Electric vehicles
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